1
KCET 2022
MCQ (Single Correct Answer)
+1
-0

If $$y=x^{\sin x}+(\sin x)^x$$, then $$\frac{d y}{d x}$$ at $$x=\frac{\pi}{2}$$ is

A
$$\frac{4}{\pi}$$
B
$$\pi \log \frac{\pi}{2}$$
C
1
D
$$\frac{\pi^2}{2}$$
2
KCET 2022
MCQ (Single Correct Answer)
+1
-0

If $$e^y+x y=e$$ the ordered pair $$\left(\frac{d y}{d x}, \frac{d^2 y}{d x^2}\right)$$ at $$x=0$$ is equal to

A
$$\left(\frac{1}{e}, \frac{1}{e^2}\right)$$
B
$$\left(\frac{-1}{e}, \frac{-1}{e^2}\right)$$
C
$$\left(\frac{1}{e}, \frac{-1}{e^2}\right)$$
D
$$\left(\frac{-1}{e}, \frac{1}{e^2}\right)$$
3
KCET 2021
MCQ (Single Correct Answer)
+1
-0

If $$a$$ and $$b$$ are fixed non-zero constants, then the derivative of $$\frac{a}{x^4}-\frac{b}{x^2}+\cos x$$ is $$m a+n b-p$$, where

A
$$m=4 x^3, n=\frac{-2}{x^3}$$ and $$p=\sin x$$
B
$$m=\frac{-4}{x^5}, n=\frac{2}{x^3}$$ and $$p=\sin x$$
C
$$m=\frac{-4}{x^5}, n=\frac{-2}{x^3}$$ and $$p=\sin x$$
D
$$m=4 x^3, n=\frac{2}{x^3}$$ and $$p=-\sin x$$
4
KCET 2021
MCQ (Single Correct Answer)
+1
-0

If $$y=\left(\cos x^2\right)^2$$, then $$\frac{d y}{d x}$$ is equal to

A
$$-4 x \sin 2 x^2$$
B
$$-x \sin x^2$$
C
$$-2 x \sin 2 x^2$$
D
$$-x \cos 2 x^2$$
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